1. The problem statement, all variables and given/known data You are given matrices A and B: 1 -2 1 A = 0 0 0 0 1 1 1 B = 0 2 Solve the equation Ax=B 2. Relevant equations x=A^(-1)*B 3. The attempt at a solution I carried out exactly the steps required for inverting a matrix. When got to th part where the determinant is calculated, I obtained a zero determinant. I thought this meant that the inverse matrix could not be calculated. This is also the result that an online matrix calculator gave for A. Hence I anwered "unsolvable" in the exam. Yet I was only given 1 out of 3 points. What should I have done differently? Thanks for your help!